247671313 has 2 divisors, whose sum is σ = 247671314. Its totient is φ = 247671312.

The previous prime is 247671299. The next prime is 247671323. The reversal of 247671313 is 313176742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212955649 + 34715664 = 14593^2 + 5892^2 .

It is a cyclic number.

It is not a de Polignac number, because 247671313 - 2¹³ = 247663121 is a prime.

It is a super-2 number, since 2×247671313² = 122682158566287938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247671323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123835656 + 123835657.

It is an arithmetic number, because the mean of its divisors is an integer number (123835657).

Almost surely, 2^247671313 is an apocalyptic number.

It is an amenable number.

247671313 is a deficient number, since it is larger than the sum of its proper divisors (1).

247671313 is an equidigital number, since it uses as much as digits as its factorization.

247671313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 247671313 is about 15737.5764652630. The cubic root of 247671313 is about 627.9984456735.

The spelling of 247671313 in words is "two hundred forty-seven million, six hundred seventy-one thousand, three hundred thirteen".